A Novel Methodology to Evaluate the Use of an Ultrasonic Tip

Evaluation of a Simplified Fiber Post Removal System

“…Ultrasonic instruments are commonly used for the removal of luted posts because of the reduced risk of root perforation and the minimal loss of tooth structure (14,26). A weight change analysis has been used in previous studies to evaluate the dentin removal efficacy of ultrasonic tips (27,28). In this study, the specimens were weighed after post space preparation and after fiber post removal, and weight loss was found to be directly correlated with excessive removal of radicular dentin.…”

Evaluation of the Breakage of Orthograde Endodontic Ultrasonic Tips

“…A 5-mm linear movement at a rate of 4 mm/s was delivered to simulate the motion of the ultrasonic handpiece used by endodontists. Previous studies have incorporated linear movements of 3-6 mm (10,(15)(16)(17)(18). Ultrasonic tip samples were not operated continuously; instead, they were activated for 20-second cycles with a 10-second rest period between each cycle.…”

Ultrasonics in endodontics

“…One study applying an axial load only to one particular diamond‐coated ultrasonic tip found a significant decrease in efficiency after 10 min of use, but no further significant decrease up to 30 min of use . A recent study has shown no significant decrease in efficiency of cutting with the same diamond‐coated ultrasonic tip up to 190 min of use, using both an axial force and a linear movement in order to more closely simulate clinical practice applications . The manner of use of an ultrasonic tip may influence its efficacy.…”

“…The manner of use of an ultrasonic tip may influence its efficacy. While no study has identified a single ultrasonic tip with consistently greater cutting efficiency than all other tips, the BUC‐1 tip has been shown in a few studies to have particular durability and efficiency, possibly attributed to its tip design and dimensions, but not necessarily factors such as the surface area available for cutting and the size or coarseness of the diamond grit particles . A recent comparison of pointed ultrasonic tips using both an axial force and linear movement found that a diamond‐coated tip removed significantly more dentin than a zirconium nitride‐coated tip and tips without a surface coating .…”